board/freescale/c29xpcie/cpld.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /**
   3  * Copyright 2013 Freescale Semiconductor
   4  * Author: Mingkai Hu <Mingkai.hu@freescale.com>
   5  *         Po Liu <Po.Liu@freescale.com>
   6  *
   7  * This file provides support for the board-specific CPLD used on some Freescale
   8  * reference boards.
   9  *
  10  * The following macros need to be defined:
  11  *
  12  * CONFIG_SYS_CPLD_BASE - The virtual address of the base of the
  13  * CPLD register map
  14  *
  15  */
  16
  17 #include <common.h>
  18 #include <command.h>
  19 #include <asm/io.h>
  20
  21 #include "cpld.h"
  22 /**
  23  * Set the boot bank to the alternate bank
  24  */
  25 void cpld_set_altbank(u8 banksel)
  26 {
  27         struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
  28         u8 reg11;
  29
  30         reg11 = in_8(&cpld_data->flhcsr);
  31
  32         switch (banksel) {
  33         case 1:
  34                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  35                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK1);
  36                 break;
  37         case 2:
  38                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  39                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK2);
  40                 break;
  41         case 3:
  42                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  43                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK3);
  44                 break;
  45         case 4:
  46                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  47                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK4);
  48                 break;
  49         default:
  50                 printf("Invalid value! [1-4]\n");
  51                 return;
  52         }
  53
  54         udelay(100);
  55         do_reset(NULL, 0, 0, NULL);
  56 }
  57
  58 /**
  59  * Set the boot bank to the default bank
  60  */
  61 void cpld_set_defbank(void)
  62 {
  63         cpld_set_altbank(4);
  64 }
  65
  66 #ifdef DEBUG
  67 static void cpld_dump_regs(void)
  68 {
  69         struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
  70
  71         printf("chipid1         = 0x%02x\n", in_8(&cpld_data->chipid1));
  72         printf("chipid2         = 0x%02x\n", in_8(&cpld_data->chipid2));
  73         printf("hwver           = 0x%02x\n", in_8(&cpld_data->hwver));
  74         printf("cpldver         = 0x%02x\n", in_8(&cpld_data->cpldver));
  75         printf("rstcon          = 0x%02x\n", in_8(&cpld_data->rstcon));
  76         printf("flhcsr          = 0x%02x\n", in_8(&cpld_data->flhcsr));
  77         printf("wdcsr           = 0x%02x\n", in_8(&cpld_data->wdcsr));
  78         printf("wdkick          = 0x%02x\n", in_8(&cpld_data->wdkick));
  79         printf("fancsr          = 0x%02x\n", in_8(&cpld_data->fancsr));
  80         printf("ledcsr          = 0x%02x\n", in_8(&cpld_data->ledcsr));
  81         printf("misc            = 0x%02x\n", in_8(&cpld_data->misccsr));
  82         printf("bootor          = 0x%02x\n", in_8(&cpld_data->bootor));
  83         printf("bootcfg1        = 0x%02x\n", in_8(&cpld_data->bootcfg1));
  84         printf("bootcfg2        = 0x%02x\n", in_8(&cpld_data->bootcfg2));
  85         printf("bootcfg3        = 0x%02x\n", in_8(&cpld_data->bootcfg3));
  86         printf("bootcfg4        = 0x%02x\n", in_8(&cpld_data->bootcfg4));
  87         putc('\n');
  88 }
  89 #endif
  90
  91 #ifndef CONFIG_SPL_BUILD
  92 int cpld_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  93 {
  94         int rc = 0;
  95         unsigned char value;
  96
  97         if (argc <= 1)
  98                 return cmd_usage(cmdtp);
  99
 100         if (strcmp(argv[1], "reset") == 0) {
 101                 if (!strcmp(argv[2], "altbank") && argv[3]) {
 102                         value = (u8)simple_strtoul(argv[3], NULL, 16);
 103                         cpld_set_altbank(value);
 104                 } else if (!argv[2])
 105                         cpld_set_defbank();
 106                 else
 107                         cmd_usage(cmdtp);
 108 #ifdef DEBUG
 109         } else if (strcmp(argv[1], "dump") == 0) {
 110                 cpld_dump_regs();
 111 #endif
 112         } else
 113                 rc = cmd_usage(cmdtp);
 114
 115         return rc;
 116 }
 117
 118 U_BOOT_CMD(
 119         cpld_cmd, CONFIG_SYS_MAXARGS, 1, cpld_cmd,
 120         "Reset the board using the CPLD sequencer",
 121         "reset - hard reset to default bank 4\n"
 122         "cpld_cmd reset altbank [bank]- reset to alternate bank\n"
 123         "       - [bank] bank value select 1-4\n"
 124         "       - bank 1 on the flash 0x0000000~0x0ffffff\n"
 125         "       - bank 2 on the flash 0x1000000~0x1ffffff\n"
 126         "       - bank 3 on the flash 0x2000000~0x2ffffff\n"
 127         "       - bank 4 on the flash 0x3000000~0x3ffffff\n"
 128 #ifdef DEBUG
 129         "cpld_cmd dump - display the CPLD registers\n"
 130 #endif
 131         );
 132 #endif